Martin Perez, last 3 starts

Martin Perez, regular season

Perez is making his fourth start since coming back from Tommy John surgery. He allowed eight runs in one-plus innings against the Yankees on Tuesday. He pitched a scoreless first, but then allowed eight straight batters to reach.

Colby Lewis, last 3 starts

Colby Lewis, regular season

Lewis has won three straight starts since the All-Star break after beating the Yankees, 5-2, on Wednesday. He is 4-1 with a 4.76 ERA in 10 starts at home. He is 2-0 with a 2.78 ERA in three starts against the Astros this season.

Mike Fiers, last 3 starts

Mike Fiers, regular season

Fiers will make his Astros debut after he was acquired Thursday along with Carlos Gomez. He pitched six innings of two-run ball in his final start with the Brewers, but was saddled with the loss in a 5-0 setback vs. the Giants.

Nick Martinez, last 3 starts

Nick Martinez, regular season

Martinez snapped a four-game losing streak with his last start, in which he went 6 1/3 innings. He has allowed at least seven hits in seven straight outings, but has also thrown at least six innings on 10 occasions.